汽車(chē)制造中沖壓工藝的新發(fā)展外文翻譯-汽車(chē)設(shè)計(jì)(存儲(chǔ)版)
【正文】 2MM engineering knowledge, body assembly size changes within 2MM quantity control, greatly in strict in the original 8MM error range. Stamping processing forming technology affect auto body manufacturing level is one of the key factors, the American experts worked in a car assembly line to over 50 cases field analysis shows that, cause body size error change many reasons, stamping itself size caused by error accumulation 23 percent, its main reason is that the traditional based on experience and original technology based on low level of mold design and manufacturing. And submillimeter stamping is the center of precision stamping with increasing agility two goals, precision is to make the stamping size accuracy control in 0 mm or and submillimeter level, the key is to control body stents, pillar on the pieces of the feet, and make changes in body covering parts, such as partitioned degrees by whole leftright side plate and the top cover plate, etc. Increasing agility meaning is refers to reduce stamping prajapati was preparation time up to 30%, including tooling design, manufacturing and tooling, sample preparation time, in order to achieve greatly shorten the purpose of the new models manufacturing cycle, this project diet are diecutting and assembly integration design, stamping system agile design and manufacturing, stamping process of intelligent detecting and monitoring, whole system integration four subsystems project. Through a study of the program and submillimeter stamping, stamping technology has witnessed progress, including: (1) the stamping process and ponent assembly process design by based on experience and the traditional craft to science and data process of transformation, (2) stamping design to CAD and simulation test mode transformation, rejected traditional attempt method, (3) to implement the mould design manufacture serial manner by the past to parallel transformation, (4) realized process monitoring and equipment maintenance from passive response to scientific prediction type transformation. 2MM project and and submillimeter stamping two project has successively is plete, and the three major automobile manufacturing pany popularization and application, and achieved many beneficial results, stamping cost greatly decreased, obtain the growing economic benefit of social benefit, and gradually applied to other countries. Special stamping technology Modern automotive stamping technology requirements towards structure is plex, block size increases, related edge parts more, carrying capacity is large and internal limit strictly etc direction. This requirement and promote special stamping technology such as hydraulic pressure forming, precision forming, explosive forming and spinning forming, no die forming, laser forming and electromagic forming technology development. Limited to this paper length, here basically introduces pressure inside the forming and electromagic forming two technologies. Modern automotive stamping technology requirements towards structure is plex, block size increases, related edge parts more, carrying capacity is large and internal limit strictly etc direction. This requirement and promote special stamping technology such as hydraulic pressure forming, precision forming, explosive forming and spinning forming, no die forming, laser forming and electromagic forming technology development. Limited to this paper length, here basically introduces pressure inside the forming and electromagic forming two technologies. The hydraulic or injection of the forming technology of elastic postures, its highpressure forming process generally includes: (1) effective media such as ice expansion iscm make the internal pressure pr
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